One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8,6,4,10,13)(3,9,11,16,12,7,14,15)(17,18,22,26,23,27,21,37)(19,28,32,39,30,43,31,24)(20,33,36,41,34,25,35,40)(29,42,46,38,45,48,44,47)(1,3,10,11,6,12,5,14)(2,7,8,16,4,9,13,15)(17,19)(18,24,27,39)(20,29)(21,31)(22,32)(23,30)(25,38,33,47)(26,28,37,43)(34,45)(35,44)(36,46)(40,48,41,42)(1,4)(2,6)(3,9)(5,8)(7,12)(10,13)(11,15)(14,16)(17,20)(18,25)(19,29)(21,36)(22,35)(23,34)(24,38)(26,41)(27,33)(28,42)(30,45)(31,46)(32,44)(37,40)(39,47)(43,48) involution — undirected(1,5,6,10)(2,8,4,13)(3,11,12,14)(7,15,9,16)(19,30)(20,34)(24,39)(25,33)(28,43)(31,32)(35,36)(40,41)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.